1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
|
/*
* Realtek RTL2830 DVB-T demodulator driver
*
* Copyright (C) 2011 Antti Palosaari <crope@iki.fi>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
*/
#include "rtl2830_priv.h"
/* Max transfer size done by I2C transfer functions */
#define MAX_XFER_SIZE 64
/* write multiple hardware registers */
static int rtl2830_wr(struct i2c_client *client, u8 reg, const u8 *val, int len)
{
int ret;
u8 buf[MAX_XFER_SIZE];
struct i2c_msg msg[1] = {
{
.addr = client->addr,
.flags = 0,
.len = 1 + len,
.buf = buf,
}
};
if (1 + len > sizeof(buf)) {
dev_warn(&client->dev, "i2c wr reg=%04x: len=%d is too big!\n",
reg, len);
return -EINVAL;
}
buf[0] = reg;
memcpy(&buf[1], val, len);
ret = i2c_transfer(client->adapter, msg, 1);
if (ret == 1) {
ret = 0;
} else {
dev_warn(&client->dev, "i2c wr failed=%d reg=%02x len=%d\n",
ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* read multiple hardware registers */
static int rtl2830_rd(struct i2c_client *client, u8 reg, u8 *val, int len)
{
int ret;
struct i2c_msg msg[2] = {
{
.addr = client->addr,
.flags = 0,
.len = 1,
.buf = ®,
}, {
.addr = client->addr,
.flags = I2C_M_RD,
.len = len,
.buf = val,
}
};
ret = i2c_transfer(client->adapter, msg, 2);
if (ret == 2) {
ret = 0;
} else {
dev_warn(&client->dev, "i2c rd failed=%d reg=%02x len=%d\n",
ret, reg, len);
ret = -EREMOTEIO;
}
return ret;
}
/* write multiple registers */
static int rtl2830_wr_regs(struct i2c_client *client, u16 reg, const u8 *val, int len)
{
struct rtl2830_dev *dev = i2c_get_clientdata(client);
int ret;
u8 reg2 = (reg >> 0) & 0xff;
u8 page = (reg >> 8) & 0xff;
/* switch bank if needed */
if (page != dev->page) {
ret = rtl2830_wr(client, 0x00, &page, 1);
if (ret)
return ret;
dev->page = page;
}
return rtl2830_wr(client, reg2, val, len);
}
/* read multiple registers */
static int rtl2830_rd_regs(struct i2c_client *client, u16 reg, u8 *val, int len)
{
struct rtl2830_dev *dev = i2c_get_clientdata(client);
int ret;
u8 reg2 = (reg >> 0) & 0xff;
u8 page = (reg >> 8) & 0xff;
/* switch bank if needed */
if (page != dev->page) {
ret = rtl2830_wr(client, 0x00, &page, 1);
if (ret)
return ret;
dev->page = page;
}
return rtl2830_rd(client, reg2, val, len);
}
/* read single register */
static int rtl2830_rd_reg(struct i2c_client *client, u16 reg, u8 *val)
{
return rtl2830_rd_regs(client, reg, val, 1);
}
/* write single register with mask */
static int rtl2830_wr_reg_mask(struct i2c_client *client, u16 reg, u8 val, u8 mask)
{
int ret;
u8 tmp;
/* no need for read if whole reg is written */
if (mask != 0xff) {
ret = rtl2830_rd_regs(client, reg, &tmp, 1);
if (ret)
return ret;
val &= mask;
tmp &= ~mask;
val |= tmp;
}
return rtl2830_wr_regs(client, reg, &val, 1);
}
/* read single register with mask */
static int rtl2830_rd_reg_mask(struct i2c_client *client, u16 reg, u8 *val, u8 mask)
{
int ret, i;
u8 tmp;
ret = rtl2830_rd_regs(client, reg, &tmp, 1);
if (ret)
return ret;
tmp &= mask;
/* find position of the first bit */
for (i = 0; i < 8; i++) {
if ((mask >> i) & 0x01)
break;
}
*val = tmp >> i;
return 0;
}
static int rtl2830_init(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
int ret, i;
struct rtl2830_reg_val_mask tab[] = {
{0x00d, 0x01, 0x03},
{0x00d, 0x10, 0x10},
{0x104, 0x00, 0x1e},
{0x105, 0x80, 0x80},
{0x110, 0x02, 0x03},
{0x110, 0x08, 0x0c},
{0x17b, 0x00, 0x40},
{0x17d, 0x05, 0x0f},
{0x17d, 0x50, 0xf0},
{0x18c, 0x08, 0x0f},
{0x18d, 0x00, 0xc0},
{0x188, 0x05, 0x0f},
{0x189, 0x00, 0xfc},
{0x2d5, 0x02, 0x02},
{0x2f1, 0x02, 0x06},
{0x2f1, 0x20, 0xf8},
{0x16d, 0x00, 0x01},
{0x1a6, 0x00, 0x80},
{0x106, dev->pdata->vtop, 0x3f},
{0x107, dev->pdata->krf, 0x3f},
{0x112, 0x28, 0xff},
{0x103, dev->pdata->agc_targ_val, 0xff},
{0x00a, 0x02, 0x07},
{0x140, 0x0c, 0x3c},
{0x140, 0x40, 0xc0},
{0x15b, 0x05, 0x07},
{0x15b, 0x28, 0x38},
{0x15c, 0x05, 0x07},
{0x15c, 0x28, 0x38},
{0x115, dev->pdata->spec_inv, 0x01},
{0x16f, 0x01, 0x07},
{0x170, 0x18, 0x38},
{0x172, 0x0f, 0x0f},
{0x173, 0x08, 0x38},
{0x175, 0x01, 0x07},
{0x176, 0x00, 0xc0},
};
for (i = 0; i < ARRAY_SIZE(tab); i++) {
ret = rtl2830_wr_reg_mask(client, tab[i].reg, tab[i].val,
tab[i].mask);
if (ret)
goto err;
}
ret = rtl2830_wr_regs(client, 0x18f, "\x28\x00", 2);
if (ret)
goto err;
ret = rtl2830_wr_regs(client, 0x195,
"\x04\x06\x0a\x12\x0a\x12\x1e\x28", 8);
if (ret)
goto err;
/* TODO: spec init */
/* soft reset */
ret = rtl2830_wr_reg_mask(client, 0x101, 0x04, 0x04);
if (ret)
goto err;
ret = rtl2830_wr_reg_mask(client, 0x101, 0x00, 0x04);
if (ret)
goto err;
/* init stats here in order signal app which stats are supported */
c->strength.len = 1;
c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->cnr.len = 1;
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_error.len = 1;
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.len = 1;
c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
/* start statistics polling */
schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
dev->sleeping = false;
return ret;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_sleep(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
dev->sleeping = true;
/* stop statistics polling */
cancel_delayed_work_sync(&dev->stat_work);
dev->fe_status = 0;
return 0;
}
static int rtl2830_get_tune_settings(struct dvb_frontend *fe,
struct dvb_frontend_tune_settings *s)
{
s->min_delay_ms = 500;
s->step_size = fe->ops.info.frequency_stepsize * 2;
s->max_drift = (fe->ops.info.frequency_stepsize * 2) + 1;
return 0;
}
static int rtl2830_set_frontend(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret, i;
u64 num;
u8 buf[3], tmp;
u32 if_ctl, if_frequency;
static const u8 bw_params1[3][34] = {
{
0x1f, 0xf0, 0x1f, 0xf0, 0x1f, 0xfa, 0x00, 0x17, 0x00, 0x41,
0x00, 0x64, 0x00, 0x67, 0x00, 0x38, 0x1f, 0xde, 0x1f, 0x7a,
0x1f, 0x47, 0x1f, 0x7c, 0x00, 0x30, 0x01, 0x4b, 0x02, 0x82,
0x03, 0x73, 0x03, 0xcf, /* 6 MHz */
}, {
0x1f, 0xfa, 0x1f, 0xda, 0x1f, 0xc1, 0x1f, 0xb3, 0x1f, 0xca,
0x00, 0x07, 0x00, 0x4d, 0x00, 0x6d, 0x00, 0x40, 0x1f, 0xca,
0x1f, 0x4d, 0x1f, 0x2a, 0x1f, 0xb2, 0x00, 0xec, 0x02, 0x7e,
0x03, 0xd0, 0x04, 0x53, /* 7 MHz */
}, {
0x00, 0x10, 0x00, 0x0e, 0x1f, 0xf7, 0x1f, 0xc9, 0x1f, 0xa0,
0x1f, 0xa6, 0x1f, 0xec, 0x00, 0x4e, 0x00, 0x7d, 0x00, 0x3a,
0x1f, 0x98, 0x1f, 0x10, 0x1f, 0x40, 0x00, 0x75, 0x02, 0x5f,
0x04, 0x24, 0x04, 0xdb, /* 8 MHz */
},
};
static const u8 bw_params2[3][6] = {
{0xc3, 0x0c, 0x44, 0x33, 0x33, 0x30}, /* 6 MHz */
{0xb8, 0xe3, 0x93, 0x99, 0x99, 0x98}, /* 7 MHz */
{0xae, 0xba, 0xf3, 0x26, 0x66, 0x64}, /* 8 MHz */
};
dev_dbg(&client->dev, "frequency=%u bandwidth_hz=%u inversion=%u\n",
c->frequency, c->bandwidth_hz, c->inversion);
/* program tuner */
if (fe->ops.tuner_ops.set_params)
fe->ops.tuner_ops.set_params(fe);
switch (c->bandwidth_hz) {
case 6000000:
i = 0;
break;
case 7000000:
i = 1;
break;
case 8000000:
i = 2;
break;
default:
dev_err(&client->dev, "invalid bandwidth_hz %u\n",
c->bandwidth_hz);
return -EINVAL;
}
ret = rtl2830_wr_reg_mask(client, 0x008, i << 1, 0x06);
if (ret)
goto err;
/* program if frequency */
if (fe->ops.tuner_ops.get_if_frequency)
ret = fe->ops.tuner_ops.get_if_frequency(fe, &if_frequency);
else
ret = -EINVAL;
if (ret)
goto err;
num = if_frequency % dev->pdata->clk;
num *= 0x400000;
num = div_u64(num, dev->pdata->clk);
num = -num;
if_ctl = num & 0x3fffff;
dev_dbg(&client->dev, "if_frequency=%d if_ctl=%08x\n",
if_frequency, if_ctl);
ret = rtl2830_rd_reg_mask(client, 0x119, &tmp, 0xc0); /* b[7:6] */
if (ret)
goto err;
buf[0] = tmp << 6;
buf[0] |= (if_ctl >> 16) & 0x3f;
buf[1] = (if_ctl >> 8) & 0xff;
buf[2] = (if_ctl >> 0) & 0xff;
ret = rtl2830_wr_regs(client, 0x119, buf, 3);
if (ret)
goto err;
/* 1/2 split I2C write */
ret = rtl2830_wr_regs(client, 0x11c, &bw_params1[i][0], 17);
if (ret)
goto err;
/* 2/2 split I2C write */
ret = rtl2830_wr_regs(client, 0x12d, &bw_params1[i][17], 17);
if (ret)
goto err;
ret = rtl2830_wr_regs(client, 0x19d, bw_params2[i], 6);
if (ret)
goto err;
return ret;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_get_frontend(struct dvb_frontend *fe)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
int ret;
u8 buf[3];
if (dev->sleeping)
return 0;
ret = rtl2830_rd_regs(client, 0x33c, buf, 2);
if (ret)
goto err;
ret = rtl2830_rd_reg(client, 0x351, &buf[2]);
if (ret)
goto err;
dev_dbg(&client->dev, "TPS=%*ph\n", 3, buf);
switch ((buf[0] >> 2) & 3) {
case 0:
c->modulation = QPSK;
break;
case 1:
c->modulation = QAM_16;
break;
case 2:
c->modulation = QAM_64;
break;
}
switch ((buf[2] >> 2) & 1) {
case 0:
c->transmission_mode = TRANSMISSION_MODE_2K;
break;
case 1:
c->transmission_mode = TRANSMISSION_MODE_8K;
}
switch ((buf[2] >> 0) & 3) {
case 0:
c->guard_interval = GUARD_INTERVAL_1_32;
break;
case 1:
c->guard_interval = GUARD_INTERVAL_1_16;
break;
case 2:
c->guard_interval = GUARD_INTERVAL_1_8;
break;
case 3:
c->guard_interval = GUARD_INTERVAL_1_4;
break;
}
switch ((buf[0] >> 4) & 7) {
case 0:
c->hierarchy = HIERARCHY_NONE;
break;
case 1:
c->hierarchy = HIERARCHY_1;
break;
case 2:
c->hierarchy = HIERARCHY_2;
break;
case 3:
c->hierarchy = HIERARCHY_4;
break;
}
switch ((buf[1] >> 3) & 7) {
case 0:
c->code_rate_HP = FEC_1_2;
break;
case 1:
c->code_rate_HP = FEC_2_3;
break;
case 2:
c->code_rate_HP = FEC_3_4;
break;
case 3:
c->code_rate_HP = FEC_5_6;
break;
case 4:
c->code_rate_HP = FEC_7_8;
break;
}
switch ((buf[1] >> 0) & 7) {
case 0:
c->code_rate_LP = FEC_1_2;
break;
case 1:
c->code_rate_LP = FEC_2_3;
break;
case 2:
c->code_rate_LP = FEC_3_4;
break;
case 3:
c->code_rate_LP = FEC_5_6;
break;
case 4:
c->code_rate_LP = FEC_7_8;
break;
}
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_read_status(struct dvb_frontend *fe, fe_status_t *status)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
int ret;
u8 tmp;
*status = 0;
if (dev->sleeping)
return 0;
ret = rtl2830_rd_reg_mask(client, 0x351, &tmp, 0x78); /* [6:3] */
if (ret)
goto err;
if (tmp == 11) {
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI | FE_HAS_SYNC | FE_HAS_LOCK;
} else if (tmp == 10) {
*status |= FE_HAS_SIGNAL | FE_HAS_CARRIER |
FE_HAS_VITERBI;
}
dev->fe_status = *status;
return ret;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_read_snr(struct dvb_frontend *fe, u16 *snr)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
int ret, hierarchy, constellation;
u8 buf[2], tmp;
u16 tmp16;
#define CONSTELLATION_NUM 3
#define HIERARCHY_NUM 4
static const u32 snr_constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
{70705899, 70705899, 70705899, 70705899},
{82433173, 82433173, 87483115, 94445660},
{92888734, 92888734, 95487525, 99770748},
};
if (dev->sleeping)
return 0;
/* reports SNR in resolution of 0.1 dB */
ret = rtl2830_rd_reg(client, 0x33c, &tmp);
if (ret)
goto err;
constellation = (tmp >> 2) & 0x03; /* [3:2] */
if (constellation > CONSTELLATION_NUM - 1)
goto err;
hierarchy = (tmp >> 4) & 0x07; /* [6:4] */
if (hierarchy > HIERARCHY_NUM - 1)
goto err;
ret = rtl2830_rd_regs(client, 0x40c, buf, 2);
if (ret)
goto err;
tmp16 = buf[0] << 8 | buf[1];
if (tmp16)
*snr = (snr_constant[constellation][hierarchy] -
intlog10(tmp16)) / ((1 << 24) / 100);
else
*snr = 0;
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_read_ber(struct dvb_frontend *fe, u32 *ber)
{
struct i2c_client *client = fe->demodulator_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
int ret;
u8 buf[2];
if (dev->sleeping)
return 0;
ret = rtl2830_rd_regs(client, 0x34e, buf, 2);
if (ret)
goto err;
*ber = buf[0] << 8 | buf[1];
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_read_ucblocks(struct dvb_frontend *fe, u32 *ucblocks)
{
*ucblocks = 0;
return 0;
}
static int rtl2830_read_signal_strength(struct dvb_frontend *fe, u16 *strength)
{
struct dtv_frontend_properties *c = &fe->dtv_property_cache;
if (c->strength.stat[0].scale == FE_SCALE_RELATIVE)
*strength = c->strength.stat[0].uvalue;
else
*strength = 0;
return 0;
}
static struct dvb_frontend_ops rtl2830_ops = {
.delsys = {SYS_DVBT},
.info = {
.name = "Realtek RTL2830 (DVB-T)",
.caps = FE_CAN_FEC_1_2 |
FE_CAN_FEC_2_3 |
FE_CAN_FEC_3_4 |
FE_CAN_FEC_5_6 |
FE_CAN_FEC_7_8 |
FE_CAN_FEC_AUTO |
FE_CAN_QPSK |
FE_CAN_QAM_16 |
FE_CAN_QAM_64 |
FE_CAN_QAM_AUTO |
FE_CAN_TRANSMISSION_MODE_AUTO |
FE_CAN_GUARD_INTERVAL_AUTO |
FE_CAN_HIERARCHY_AUTO |
FE_CAN_RECOVER |
FE_CAN_MUTE_TS
},
.init = rtl2830_init,
.sleep = rtl2830_sleep,
.get_tune_settings = rtl2830_get_tune_settings,
.set_frontend = rtl2830_set_frontend,
.get_frontend = rtl2830_get_frontend,
.read_status = rtl2830_read_status,
.read_snr = rtl2830_read_snr,
.read_ber = rtl2830_read_ber,
.read_ucblocks = rtl2830_read_ucblocks,
.read_signal_strength = rtl2830_read_signal_strength,
};
static void rtl2830_stat_work(struct work_struct *work)
{
struct rtl2830_dev *dev = container_of(work, struct rtl2830_dev, stat_work.work);
struct i2c_client *client = dev->client;
struct dtv_frontend_properties *c = &dev->fe.dtv_property_cache;
int ret, tmp;
u8 u8tmp, buf[2];
u16 u16tmp;
dev_dbg(&client->dev, "\n");
/* signal strength */
if (dev->fe_status & FE_HAS_SIGNAL) {
struct {signed int x:14; } s;
/* read IF AGC */
ret = rtl2830_rd_regs(client, 0x359, buf, 2);
if (ret)
goto err;
u16tmp = buf[0] << 8 | buf[1] << 0;
u16tmp &= 0x3fff; /* [13:0] */
tmp = s.x = u16tmp; /* 14-bit bin to 2 complement */
u16tmp = clamp_val(-4 * tmp + 32767, 0x0000, 0xffff);
dev_dbg(&client->dev, "IF AGC=%d\n", tmp);
c->strength.stat[0].scale = FE_SCALE_RELATIVE;
c->strength.stat[0].uvalue = u16tmp;
} else {
c->strength.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* CNR */
if (dev->fe_status & FE_HAS_VITERBI) {
unsigned hierarchy, constellation;
#define CONSTELLATION_NUM 3
#define HIERARCHY_NUM 4
static const u32 constant[CONSTELLATION_NUM][HIERARCHY_NUM] = {
{70705899, 70705899, 70705899, 70705899},
{82433173, 82433173, 87483115, 94445660},
{92888734, 92888734, 95487525, 99770748},
};
ret = rtl2830_rd_reg(client, 0x33c, &u8tmp);
if (ret)
goto err;
constellation = (u8tmp >> 2) & 0x03; /* [3:2] */
if (constellation > CONSTELLATION_NUM - 1)
goto err_schedule_delayed_work;
hierarchy = (u8tmp >> 4) & 0x07; /* [6:4] */
if (hierarchy > HIERARCHY_NUM - 1)
goto err_schedule_delayed_work;
ret = rtl2830_rd_regs(client, 0x40c, buf, 2);
if (ret)
goto err;
u16tmp = buf[0] << 8 | buf[1] << 0;
if (u16tmp)
tmp = (constant[constellation][hierarchy] -
intlog10(u16tmp)) / ((1 << 24) / 10000);
else
tmp = 0;
dev_dbg(&client->dev, "CNR raw=%u\n", u16tmp);
c->cnr.stat[0].scale = FE_SCALE_DECIBEL;
c->cnr.stat[0].svalue = tmp;
} else {
c->cnr.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
/* BER */
if (dev->fe_status & FE_HAS_LOCK) {
ret = rtl2830_rd_regs(client, 0x34e, buf, 2);
if (ret)
goto err;
u16tmp = buf[0] << 8 | buf[1] << 0;
dev->post_bit_error += u16tmp;
dev->post_bit_count += 1000000;
dev_dbg(&client->dev, "BER errors=%u total=1000000\n", u16tmp);
c->post_bit_error.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_error.stat[0].uvalue = dev->post_bit_error;
c->post_bit_count.stat[0].scale = FE_SCALE_COUNTER;
c->post_bit_count.stat[0].uvalue = dev->post_bit_count;
} else {
c->post_bit_error.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
c->post_bit_count.stat[0].scale = FE_SCALE_NOT_AVAILABLE;
}
err_schedule_delayed_work:
schedule_delayed_work(&dev->stat_work, msecs_to_jiffies(2000));
return;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
}
/*
* I2C gate/repeater logic
* We must use unlocked i2c_transfer() here because I2C lock is already taken
* by tuner driver. Gate is closed automatically after single I2C xfer.
*/
static int rtl2830_select(struct i2c_adapter *adap, void *mux_priv, u32 chan_id)
{
struct i2c_client *client = mux_priv;
struct rtl2830_dev *dev = i2c_get_clientdata(client);
struct i2c_msg select_reg_page_msg[1] = {
{
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = "\x00\x01",
}
};
struct i2c_msg gate_open_msg[1] = {
{
.addr = client->addr,
.flags = 0,
.len = 2,
.buf = "\x01\x08",
}
};
int ret;
/* select register page */
ret = __i2c_transfer(client->adapter, select_reg_page_msg, 1);
if (ret != 1) {
dev_warn(&client->dev, "i2c write failed %d\n", ret);
if (ret >= 0)
ret = -EREMOTEIO;
goto err;
}
dev->page = 1;
/* open tuner I2C repeater for 1 xfer, closes automatically */
ret = __i2c_transfer(client->adapter, gate_open_msg, 1);
if (ret != 1) {
dev_warn(&client->dev, "i2c write failed %d\n", ret);
if (ret >= 0)
ret = -EREMOTEIO;
goto err;
}
return 0;
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static struct dvb_frontend *rtl2830_get_dvb_frontend(struct i2c_client *client)
{
struct rtl2830_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
return &dev->fe;
}
static struct i2c_adapter *rtl2830_get_i2c_adapter(struct i2c_client *client)
{
struct rtl2830_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
return dev->adapter;
}
static int rtl2830_probe(struct i2c_client *client,
const struct i2c_device_id *id)
{
struct rtl2830_platform_data *pdata = client->dev.platform_data;
struct rtl2830_dev *dev;
int ret;
u8 u8tmp;
dev_dbg(&client->dev, "\n");
if (pdata == NULL) {
ret = -EINVAL;
goto err;
}
/* allocate memory for the internal state */
dev = kzalloc(sizeof(*dev), GFP_KERNEL);
if (dev == NULL) {
ret = -ENOMEM;
goto err;
}
/* setup the state */
i2c_set_clientdata(client, dev);
dev->client = client;
dev->pdata = client->dev.platform_data;
dev->sleeping = true;
INIT_DELAYED_WORK(&dev->stat_work, rtl2830_stat_work);
/* check if the demod is there */
ret = rtl2830_rd_reg(client, 0x000, &u8tmp);
if (ret)
goto err_kfree;
/* create muxed i2c adapter for tuner */
dev->adapter = i2c_add_mux_adapter(client->adapter, &client->dev,
client, 0, 0, 0, rtl2830_select, NULL);
if (dev->adapter == NULL) {
ret = -ENODEV;
goto err_kfree;
}
/* create dvb frontend */
memcpy(&dev->fe.ops, &rtl2830_ops, sizeof(dev->fe.ops));
dev->fe.demodulator_priv = client;
/* setup callbacks */
pdata->get_dvb_frontend = rtl2830_get_dvb_frontend;
pdata->get_i2c_adapter = rtl2830_get_i2c_adapter;
dev_info(&client->dev, "Realtek RTL2830 successfully attached\n");
return 0;
err_kfree:
kfree(dev);
err:
dev_dbg(&client->dev, "failed=%d\n", ret);
return ret;
}
static int rtl2830_remove(struct i2c_client *client)
{
struct rtl2830_dev *dev = i2c_get_clientdata(client);
dev_dbg(&client->dev, "\n");
i2c_del_mux_adapter(dev->adapter);
kfree(dev);
return 0;
}
static const struct i2c_device_id rtl2830_id_table[] = {
{"rtl2830", 0},
{}
};
MODULE_DEVICE_TABLE(i2c, rtl2830_id_table);
static struct i2c_driver rtl2830_driver = {
.driver = {
.owner = THIS_MODULE,
.name = "rtl2830",
},
.probe = rtl2830_probe,
.remove = rtl2830_remove,
.id_table = rtl2830_id_table,
};
module_i2c_driver(rtl2830_driver);
MODULE_AUTHOR("Antti Palosaari <crope@iki.fi>");
MODULE_DESCRIPTION("Realtek RTL2830 DVB-T demodulator driver");
MODULE_LICENSE("GPL");
|